The saturated-absorption resonances on the 3 P 0,1,2 – 3 D 1,2,3 transitions of magnesium atoms in a hollow-cathode discharge cell are studied. The line width (FWHM) for the observed saturated-absorption resonance on the 3 3 P 0 → 3 3 D 1 transition turns out to be ≈220 MHz. Experiments are performed using a system based on a 766-nm diode laser with amplification and frequency doubling in a nonlinear BiBO crystal. The results obtained are of interest for sub-Doppler cooling on the 3 3 P 2 → 3 3 D 3 transition.

中文翻译：

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空心阴极放电池中镁原子的3 P 0,1,2-3 D 1,2,3跃迁的饱和吸收共振研究

研究了空心阴极放电室中镁原子在3 P 0,1,2-3 D 1,2,3跃迁上的饱和吸收共振。在3 3 P 0→3 3 D 1跃迁上观察到的饱和吸收共振的线宽（FWHM）约为≈220 MHz。使用基于766 nm二极管激光器的系统进行实验，该系统在非线性BiBO晶体中具有放大和倍频功能。所获得的结果对于3 3 P 2→3 3 D 3跃迁上的亚多普勒冷却很有用。